System Sensor Pipe Installation - Manual (Page 19)

User Guide: Aspirating Smoke Detector Pipe Installation
19
Basic Pipe Network Cleaning
and Maintenance Procedure
Periodic maintenance of the FAAST Fire Alarm Aspiration Sens-
ing Technology pipe network is recommended in environments
with high amounts of airborne particulate, or cold environments
where condensation may freeze on the sampling port and affect
pipe network performance. Annual maintenance of the pipe
network is recommended for all installations.
Low flow faults on devices which have been installed and oper-
ating normally for a period of time may signal the need for pipe
network cleaning.
Pipe Network Maintenance
During installation of the pipe network, it is recommended that
a valved tee fitting be installed 6 inches to 1 foot from the pipe
inlet so that the pipe entering the detector is not subject to any
flow of air during the pipe network maintenance. Forcing air in
to, or out of, the FAAST unit by any means other than the inher-
ent fan may cause damage to the device and nullify the device
warranty.
Prior to beginning pipe network maintenance:
• Place the device in isolate or disable mode, or power
down.
• Remove the pipe network from the device, or switch the
valve on a valved tee fitting to ensure that no air can be
force in to or out of the device
To perform pipe network maintenance:
• Affix a vacuum cleaner, or air compressor, to the end of
the pipe network or the entry in to the valved tee fitting.
• While the vacuum is running, use a dry brush or pipe
cleaner to swab out each sampling port in the pipe net-
work. Leave vacuum running for 2 min following last port
cleaning.
Post pipe network maintenance:
• Reconnect pipe network to the FAAST device or switch
the valved tee tap
• Remove the device from isolate or disable mode, or
reapply power to the FAAST
• Observe the air flow pendulum on the user interface. The
two green indicators should be near center underneath
the device’s power indicator. If a low condition existed
before maintenance, this condition should be clear after
maintenance (NOTE: if the device is set to latch in fault,
the device will need to be reset to clear the fault)
• If the low flow condition persists, perform another manual
check of the pipe network against the pipe layout report
generated by PipeIQ. Also, if the exhaust pipe is not
situated in the protected space the low/high flow condition
could be the result of differences in room pressures that
have changed do to open doors, windows or upgrades to
ventilation units.
Filter Maintenance
Filter maintenance is required only when a ‘Filter’ fault is indi-
cated by the FAAST unit. Perform the following procedure to
replace the filter assembly:
1. Remove power from the system.
2. Open the door on the right side of the device that covers
the LED system indicators.
3. Remove the plastic name card over the LEDs.
4. Remove the two screws holding the filter assembly into
the device.
5. Remove the filter assembly and replace it with a
new assembly.
6. Torque the two Phillips-head screws to 6in-lb (0.7 N-M)
or ¼ turn past “lightly snug’. DO NOT OVERTIGHTEN.
7. Replace the plastic name card over the LEDs.
8. Close the door and restore power to the system.